I have in the past had a post for Robotic Quilting and those that are compatible with the Bailey. Most recently I have found through the grapevine that another quilter has purchased a Quilt Ez that is very similar to the PCQ.
http://quiltez.com/butler/
I am including the link above so that you can do your own homework and view the short video. The bailey owner that has purchased this unit states it works very well and no problem.